Momentum spectrum measurement appts. of elastically scattered X=rays

摘要

The appts. measures the momentum transfer spectrum of elastically scattered X-ray quanta. The appts. comprises a polychromatic X-ray source (20), the radiation (23) from which is incident on a first horizontally arranged circular aperture (22) within a shutter (21). The scattered radiation arising from the sample (25) is then detected via a second horizontal slit aperture (30, 31) by a detector arrangement (32-53), within the horizontal detector (D). The sample (25) can be moved slowly so that the sample is scanned by the X-rays. The detector (D) is sepd. into at least two regions of equal width, arranged perpendicularly to the scanning direction, with each detector region having a number of partial circular segments detector elements each of which is connected to a corresp. signal processor.